HP-67 Reads cards but does not write

[teenix]

Hi Trevor,

Your persistence may have provided some insight as to the repair of other card reader boards. In that they might simply need a good wash to restore them to a working state. Interesting.

I have found that cleaning flux residue with isopropyl alcohol can sometimes leave a white powder like substance, especially so if you clean with denatured alcohol. I use a small ultrasonic cleaner and usually give a warm detergent wash and rinse afterwards to help clean up any residue, although this doesn't guarantee cleanliness under some parts.

Nice work.

cheers

Tony